MSP430-AD单通道多次转换C程序

*********************************************************/ #include #include\"1602.h\" #include\"define.h\"

#define num_of_results 32

static uint results[num_of_results];

/************************************ 功能：将数字量转为模拟量并显示 输入：寄存器ADC12MEM0中的数值 输出：无

************************************/ void tran(uint ad1) {

uint val;

unsigned long ad; uchar aa,bb,cc; ad=ad1;

val=ad*330/4096; //ad*330将会超过16位所以要把ad转为32的long型（如4096*330>65536） aa=val/100; bb=val/10%10; cc=val%10; gotoxy(5,1);

write_data(0x30+aa); write_data('.');

write_data(0x30+bb); write_data(0x30+cc); }

void main(void) {

WDTCTL=WDTPW+WDTHOLD; init_clk(); init_lcd();

P6SEL|=0X01;

ADC12CTL0=ADC12ON+SHT0_8+MSC; ADC12CTL1=SHP+CONSEQ_2; ADC12IE=0X01; ADC12CTL0|=ENC;

ADC12CTL0|=ADC12SC;

_EINT(); LPM0; }

/*************************************

功能：读取ADC12MEM0中的值并求平均以提高稳定性和精确性 输入：无 输出：无

*************************************/ #pragma vector=ADC_VECTOR __interrupt void ADC12ISR(void) {

static uchar index = 0;

results[index++] = ADC12MEM0; //取转换存储寄存器值 if(index == num_of_results) {

uchar i;

unsigned long sum = 0; index = 0;

for(i = 0; i < num_of_results; i++) {

sum += results[i]; }

sum = sum/num_of_results; //除以Num_of_Results tran(sum); } }